智能函數(shù)波形發(fā)生器外文文獻(xiàn)原文(共7頁(yè))

1、精選優(yōu)質(zhì)文檔-傾情為你奉上畢業(yè)設(shè)計(jì)（論文）外文翻譯題 目: 智能函數(shù)波形發(fā)生器的設(shè)計(jì)與實(shí)現(xiàn) 英文題目: Design And Realization Of Intelligent Function Waveform Generator系 : 信息工程系_專(zhuān) 業(yè): 電子信息工程_班 級(jí): 07電信本_ 學(xué) 號(hào): _ 姓 名: 趙臻_(kāi)指導(dǎo)老師: 譚金平_填表日期：2010-12-18_The Design of Virtual Function waveform GeneratorAbstractIn this paper, a Virtual Function Signal Generator

2、is designed Based on Labview. How to design the generator is introduced in detail. The Virtual Function Signal Generator can generate basic wave such as Sine wave, formula wave, white noise etc. The generator has functions like wave showing and date saving in addition.Keywords- Virtual Instrument; L

3、abview;Function Signal GeneratorI. INTRODUCTIONThe function signal generator is applied in great many of fields. Virtual Instrument is a new type of instrument which has especial functions that old one do not have. One VI includes PC, hardware which is particularly designed and special software. Bei

4、ng a graphical programming language Labview is used for date gathering, instrument controlling and date analyzing. How to design virtual function signal generator by Labview is explained in detail in the following paper.II. TOTAL DESIGNAccording to the principle of function signal generator,four par

5、ts were designed to compose virtual function signal generator. These four parts are property setting, signal generating, wave showing and date saving.A. Panel of GeneratorIn this system the panel are divided to property setting panel(fig.1) and total structure panel(fig.2) . Main options in the firs

6、t one are frequency, amplitude, duty cycle and samples etc. about signal. These properties can be set in this panel. Total structure panel just includes four parts that were presented above and some additional parts. Figure 1.Property Set Panel Figure2.Total Structure PanelB. Function about Instrume

7、ntsThe Virtual Function Signal Generator can generate basic waves such as Sine wave , special waves like formula wave and some kinds of noise. Signals frequency can be regulated delicately or roughly. Property can be reset quickly and be used as subprogram sometimes. Moreover has the generator funct

8、ions like wave showing and date saving etc.III. SOFTWARE ABOUT VIRTUAL FUNCTION SIGNAL GENERATORThe Virtual Function Signal Generator was designed base on Labview 7.0. There are three modules which compose this system: module of property setting, wave generating, wave showing and saving.A. Module of

9、 Property SettingFrequency setting and property resetting are two important parts of this module. How to change frequency value multiply is explained in fig.3. Node Selectting isapplied repeatedly and skillfully so that data can be input in many channels. Then select data by switch button. So freque

10、ncy controlling can be designed as real instrument. How to reset property quickly is explained in fig.4. Figure4. Property ResetFigure3. Frequency Control B. Module of Wave GeneratingThis module is the core of the Virtual Function Signal Generator. Structure CASE is used in this work. By special nod

11、e many types of waves can be generated. For example, how to generate sine wave is explained in fig.5. The other ones can be generated in similar way.Figure5.Graphical Progranm About Sine Wave GenerateC. Module of Wave Showing and SavingIn fact this module is a composite one which include many functi

12、ons as operating, applying, debugging, showing etc. Because of lots of acts would be operated though this interface, this interface must be not only practical but also nice. Fig.6 just explained how to solve these problems.Figure6.Graphical Program About TotalIV. CONCLUSIONBeing graphical language,

13、Labview is very strong and easy tool to make system of measure and test. Virtual Function Signal Generator based on Labview has advantages such as having friendly interface, operating easily etc. It can generate many types of function signals which have big range of value of frequency and its output

14、 datas can be saved. So it can be applied widely.虛擬函數(shù)波形發(fā)生器的設(shè)計(jì)摘要 在本次設(shè)計(jì)中,虛函數(shù)信號(hào)發(fā)生器是基于相位差來(lái)設(shè)計(jì)的。文中詳細(xì)地介紹了如何設(shè)計(jì)發(fā)生器。虛擬函數(shù)信號(hào)發(fā)生器能產(chǎn)生基本波如正弦波,方波,白噪聲等。除此之外，這個(gè)函數(shù)信號(hào)發(fā)生器還有波形顯示和數(shù)據(jù)存儲(chǔ)功能。關(guān)鍵詞 虛擬儀器；圖形化編程軟件；函數(shù)信號(hào)發(fā)生器一 虛擬函數(shù)波形發(fā)生器的介紹 函數(shù)信號(hào)發(fā)生器是應(yīng)用于很多領(lǐng)域。虛擬儀器是一種新型的具有特殊功能的儀器。虛擬函數(shù)信號(hào)發(fā)生器的設(shè)計(jì)包括詳細(xì)的計(jì)算機(jī)硬件設(shè)計(jì)和特殊的軟件設(shè)計(jì)。作為一個(gè)圖形化編程語(yǔ)言的虛擬儀器，它是用來(lái)收集相位差、控制儀

15、表和分析數(shù)據(jù)的。以下將會(huì)詳細(xì)介紹如何利用虛擬儀器來(lái)設(shè)計(jì)虛擬函數(shù)信號(hào)發(fā)生器。二 系統(tǒng)設(shè)計(jì)根據(jù)函數(shù)信號(hào)發(fā)生器的工作原理,虛擬函數(shù)信號(hào)發(fā)生器是由四個(gè)部分來(lái)構(gòu)成的。這四個(gè)部分包括屬性設(shè)定、信號(hào)產(chǎn)生、波形顯示和數(shù)據(jù)存儲(chǔ)。1.硬件系統(tǒng)設(shè)計(jì)在本系統(tǒng)中，硬件面板分為屬性設(shè)定面板（圖1）和信息管理總體結(jié)構(gòu)面板(圖2)。第一部分屬性設(shè)定主要包括輸出信號(hào)的頻率、幅值和取樣等。這些屬性可以通過(guò)屬性設(shè)定面板來(lái)設(shè)定。信息管理系統(tǒng)總體結(jié)構(gòu)主要是由上面提及的四部分和一些外部設(shè)備組成。 圖1 屬性設(shè)定面板 圖2 信息管理總體結(jié)構(gòu)面板2.儀器的功能虛擬函數(shù)信號(hào)發(fā)生器能產(chǎn)生基本波如正弦波、方波和噪音一樣的特殊波形。信號(hào)的頻率可以微

16、調(diào)和粗調(diào)。發(fā)生器可以迅速地被重置，有時(shí)還可以被用作子儀器。另外發(fā)生器還有波形顯示和數(shù)據(jù)存儲(chǔ)功能。三 軟件設(shè)計(jì) 虛擬函數(shù)信號(hào)發(fā)生器的設(shè)計(jì)基于LabView 7.0的基礎(chǔ)。其中有3個(gè)模塊組成這個(gè)系統(tǒng)：屬性的設(shè)置，波浪發(fā)電，波浪模塊顯示和保存。1.屬性設(shè)計(jì)模塊 頻率設(shè)定和屬性重置是此模塊的兩個(gè)重要組成部分。圖3解析了如何改變頻率值。節(jié)點(diǎn)的選用和多次巧妙的運(yùn)用，使數(shù)據(jù)可以在多渠道中輸入。通過(guò)開(kāi)關(guān)按鈕，然后選擇數(shù)據(jù)。因此，頻率控制，可設(shè)計(jì)成真正的工具。圖4解析了如何迅速重置設(shè)置。 圖3 頻率控制 圖4 屬性重置2.產(chǎn)生波形模塊波形產(chǎn)生模塊是虛擬函數(shù)信號(hào)發(fā)生器的核心。結(jié)構(gòu)就是用于完成這項(xiàng)工作。通過(guò)特殊的節(jié)

17、點(diǎn)可以產(chǎn)生多種波形。例如，如何產(chǎn)生正弦波，圖5做出了解析。其它的波形通過(guò)類(lèi)似的方式產(chǎn)生。圖5 產(chǎn)生正弦波電路圖3、波形顯示模塊與數(shù)據(jù)存儲(chǔ)模塊 事實(shí)上，波形顯示與數(shù)據(jù)存儲(chǔ)模塊模塊是一個(gè)綜合多種功能的模塊，其中包括為運(yùn)行，應(yīng)用，調(diào)試，顯示等功能。因?yàn)榇罅康牟僮鞫际窃谶@個(gè)操作界面完成，因此，這個(gè)操作界面不僅要實(shí)用，而且要很完善。圖6只解釋了如何解決這些問(wèn)題。 圖6 設(shè)計(jì)總圖四 結(jié)論作為圖形化編程語(yǔ)言，LabVIEW是非常強(qiáng)大和快捷的工具，在測(cè)量和測(cè)試系統(tǒng)方面有很大的作用。基于Labview的虛擬函數(shù)信號(hào)發(fā)生器具有完善的界面，而且具有操作簡(jiǎn)便、快捷等優(yōu)點(diǎn)。虛擬函數(shù)信號(hào)發(fā)生器具有產(chǎn)生多種類(lèi)型信號(hào)的功能，

18、而且輸出的頻率調(diào)節(jié)范圍大，輸出數(shù)據(jù)可以被保存。因此，它可以廣泛應(yīng)用。五、參考文獻(xiàn):1 許慶山等編. 電路、信號(hào)與系統(tǒng).M 北京：航空工業(yè)出版社，2002，22-56.2 Sullvan G J. Rate-distortion optimization for video compression.J IEEE Signal Processing. Mag., 1998, 15(6): 74-90 3 Bentley, John P. Priniple of Measurement Systems,P Longman, London and NewYork, 2004 4相迎軍,李興城,李傳軍. 基于AT89C4051單片機(jī)的專(zhuān)用信號(hào)發(fā)生器設(shè)計(jì)與應(yīng)用J. 微計(jì)算